620 ILCS 65/25: Jurisdiction over airport property.

Airport property shall not be subject to the laws of any unit of local government except as provided by ordinance of the City. Plans of all public agencies that may affect the O'Hare Modernization Program shall be consistent with the O'Hare Modernization Program, and to the extent that any plan of any public agency or unit or division of State or local government is inconsistent with the O'Hare Modernization Program, that plan is and shall be void and of no effect.